- Pregnancy, breastfeeding or unwillingness/inability to adhere to contraceptive methods for the duration of the study (Female study volunteers must not participate in a conception process (e.g., active attempt to become pregnant). If participating in sexual activity that could lead to pregnancy, the female study volunteer must use the following forms of contraception while receiving study-specific medication(s) and for 30 days after stopping the medication. One of the following methods MUST be used appropriately: (1)Condoms* (male or female) with or without a spermicidal agent; (2)Diaphragm or cervical cap with spermicide; (3)IUD; (4)Hormonal-based method.Condoms are recommended because their appropriate use is the only contraception method effective for preventing HIV transmission.